diff -Nuar a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt	2017-12-08 04:02:04.000000000 +0300
+++ b/CMakeLists.txt	2017-12-17 11:11:24.680708300 +0300
@@ -22,7 +22,7 @@
 include(ECMCoverageOption)
 
 
-set(QT_REQUIRED_VERSION "5.8.0")
+set(QT_REQUIRED_VERSION "5.7.1")
 set(AKONADI_NOTES_VERSION ${PIM_VERSION})
 
 set(KMIMELIB_VERSION "5.7.0")
